MODELS C 7SB2 C 7BD2 Hitachi Power Tools TECHNICAL DATA CIRCULAR SAWS C 7SB2/C 7BD2 SERVICE MANUAL LIST Nos. C 7SB2: 0591 Revised Aug. 2005 C 7BD2: 0592 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
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REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows: Competitors Symbols Utilized Company Name Model Name 5007NH MAKITA 5007NBA DW368 DEWALT...
1. PRODUCT NAME Hitachi 7-1/4" Circular Saws, Models C 7SB2 and C 7BD2 2. MARKETING OBJECTIVE The current mainstream of professional-use circular saws is the 7-1/4 " (185 mm) class in the North America market. Although we have been selling the Models C 7SB and C 7BD (with brake) of this class, over 10 years have passed since the sales start in 1989.
The Models C 7SB2 for USA and C 7BD2 are equipped with the 24-tooth carbide tipped saw blade that is the current mainstream of standard saw blade. Green urethane painting is applied on the surface to distinguish the Hitachi saw blade from others at a glance. (4) Soft and comfortable grip The non-slip, soft and comfortable grip is adopted to improve the operability.
5. SPECIFICATIONS Model C 7SB2 C 7BD2 Item Saw blade diameter 7-1/4" (185 mm) at 90˚ 2-3/8" (60 mm) Max. at 45˚ 1-27/32" (47 mm) cutting 1-11/16" (43 mm) at 50˚ (for USA, AUS and NZL) depth at 55˚ (for USA, AUS and NZL) 1-17/32"...
6. COMPARISONS WITH SIMILAR PRODUCT 6-1. Specification Comparison Maker Model • HITACHI HITACHI Item Unit C 7SB2 C 7SB 5007NH DW368 C 7BD2 C 7BD 5007NBA DW369CS • 2-3/8 2-3/8 2-3/8 2-3/8 2-3/8 2-3/8 Cutting 90˚ (60) (60) (60) (mm)
Hemlock spruce (thickness 60 mm), vertical cutting HITACHI C 7SB2/C 7BD2 (for Cutting speed (m/min.) This graph shows the relation between the cutting speed and the load current. If the load current is low, the load applied to the motor is also low, and generally the cutting capacity is more excellent when comparing the cutting capacity at the same speed.
7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Models C 7SB2 and C 7BD2 Circular Saws by all of our customers, it is very important that at the time of sale the salesman carefully ensures that the buyer seriously recognizes the importance of the contents of the Instruction Manual, and fully understands the meaning of the precautions listed on the Name Plate attached to each tool.
For Europe 7-3. Do Not Use Cut-Off Wheels The Models C 7SB2 and C 7BD2 are not designed for use with cut-off wheels (grindstones). The customers must be cautioned that the use of a cut-off wheel would be extremely dangerous. --- 7 ---...
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List for the Model C 7SB2, and the <Bold> numbers for the Model C 7BD2. During disassembly and reassembly, and at all other times as well, sufficient care must be exercised in handling to ensure that is no deviation in the flatness of the bottom surface of the base and in its perpendicularity with relation to the saw blade.
8-2. Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse. However, particular attention should be given to the following items. (1) Tightening torque for fastening screws: M4 machine screws 0.4 N m (12 to 19 in-lbs.) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...
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(5) Wiring diagrams (See Figs. from 3 to 6.): A. Model C 7SB2 For the U.S.A. Black Stator coil White Power source Black Stator coil Fig. 3 For AUS/GBR (110 V) Fig. 4 For NZL/Europe Fig. 5 --- 10 ---...
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B. Model C 7BD2 Black Blue Power source Yellow Brake coil White Black Stator coil Fig. 6 --- 11 ---...
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(6) Internal wire arrangement (See Figs. from 7 to 10.): Connect internal wires as illustrated in Figs. from 7 to 10. At this time, ensure that none of the wires are pinched between components during reassembly. A. Model C 7SB2 For the U.S.A.
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For NZL/Europe Fig. 9 B. Model C 7BD2 Black Blue Yellow White Black Fig. 10 --- 13 ---...
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(7) Insulation tests: On completion of disassembly and repair, measure the insulation resistance and conduct dielectric strength test. Insulation resistance: 7 M Ω or more with DC 500 V Megohm Tester Dielectric strength: AC 2,500V/1 minute, with no abnormalities (8) Cleaning the cover: Clean the exterior of the tool with a soft cloth moistened with soapy water, and dry thoroughly.
9. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow C 7SB2 C 7BD2 Switch Cord Housing Ass'y Stator Ass'y General Assembly Safety Cover Armature Return Spring Ball Bearing (6202VV) Ball Bearing (6000VV) Gear Cover Spindle and Gear Set Ball Bearing (6003VV)
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Hitachi Power Tools LIST NO. 0591 ELECTRIC TOOL PARTS LIST CIRCULAR SAW 2005 • • Model C 7SB2 (E2)
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PARTS C 7SB2 ITEM CODE NO. REMARKS DESCRIPTION USED 301-653 TAPPING SCREW (W/FLANGE) D4X20 (BLACK) 938-241 BRUSH HOLDER 999-038 CARBON BRUSH (1 PAIR) 945-161 BRUSH CAP 958-049 CORD ARMOR D8.2 940-778 CORD ARMOR D10.7 500-453Z CORD (CORD ARMOR D10.7) 500-439Z CORD (CORD ARMOR D8.2) FOR AUS, NZL 500-435Z...
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STANDARD ACCESSORIES C 7SB2 ITEM CODE NO. DESCRIPTION REMARKS USED 321-188 CASE 940-543 BOX WRENCH 10MM 302-691 GUIDE 1 FOR AUS, NZL, EUROPE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 302-691 GUIDE --- 4 --- Printed in Japan 7 -- 05 * ALTERNATIVE PARTS (050708N)
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Hitachi Power Tools LIST NO. 0592 ELECTRIC TOOL PARTS LIST CIRCULAR SAW 2005 • • Model C 7BD2 (E2) 49 50...
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PARTS C 7BD2 ITEM CODE NO. REMARKS DESCRIPTION USED 320-950 SWITCH (1P SCREW TYPE) 305-720 TAPPING SCREW (W/FLANGE) D4X12 320-952 HANDLE COVER 320-967 GRIP COVER 322-260 SEAL LOCK SCREW (W/SP. WASHERS) M6X14 322-600 LEVER (A) W/STOPPER 322-261 LOCK NUT SET (W/SCREW) 320-975 WASHER 320-961...
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STANDARD ACCESSORIES C 7BD2 ITEM CODE NO. DESCRIPTION REMARKS USED 321-188 CASE 320-976 WRENCH 10MM OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 302-691 GUIDE --- 4 --- Printed in Japan 8 -- 05 * ALTERNATIVE PARTS (050810N)